I have felt for a long time that Hillary would eventually get enough of BO and hit the trail. Also, consider this: Hillary is triangulating for 2012 and may be beginning to believe that BO is going to fail. Hillary does NOT want to be part of a failure. If she is tied to BO, she is doomed.
Bill has disappeared as well. When his type lays low, I suspect he’s plotting and waiting.
The question is why the HildeBeast accepted the offer to play second fiddle to Obama in the first place. Did she think Obama was going to be a huge success and she wanted to be part of that success ?